It is a family of great commercial importance. The alkaloids extracted from many members of this family are widely used as medicines. Because of their alkaloid content many of these are poisonous to livestock and mankind. Also food plants like Potatoes, Tomatoes, Bellpeppers, Chili-peppers, Cape Gooseberries belong to this family. Petunia and Cestrum species (Night Jassamine and Day Jassamine) and Schizanthus spp. (the Butterfly Flower) are some of the common ornamentals belonging to this family.